Ultrasonographic appearance of the lower urinary tract in fifteen normal horses.

This research aimed to describe the typical ultrasound appearance of the lower urinary tract in horses and to evaluate ureteral contractility. The findings will be useful in diagnosing horses with suspected urinary tract disease.

Objective and Scope of the Study

• The study was conducted to describe the normal ultrasound appearance of specific structures in the horses’ lower urinary tract, specifically the caudal portion of the ureters, pelvic urethra, and urinary bladder.
• The study also aimed to assess ureteral contractility, which involves the muscle movements in the ureter, the tube that carries urine from the kidneys to the bladder.
• The researchers used fifteen healthy horses with no signs of urinary tract disease as subjects for this study. These included five females, five intact males, and five geldings.

Methodology

• The lower urinary tract of the horses was evaluated using a transrectal ultrasonographic approach. This is a non-invasive method that involves inserting an ultrasound probe in the rectum to visualize the structures of interest.
• The researchers examined the normal ultrasound appearance of different structures in the lower urinary tract and their anatomical connections.

Findings

• Both ureters were identified in the position dorsal (toward the back) of the bladder and at their openings into the bladder.
• The study noted the differences between ureters and other structures such as the male deferent ducts/ampullae and vesicular glands—a vital distinction for accurate diagnoses.
• The study recorded the diameter measurements of the ureters and the urethra, as well as the thickness of the ureteral, urethral, and bladder walls.

Implications of the Study

• The study’s parameters can help veterinarians during sonographic examinations of horses suspected of having urinary tract disease.
• The use of transrectal ultrasonography was identified as a valuable tool in assessing ureteral contractions and identifying structural abnormalities in the lower urinary tract.
• This research also demonstrated that the use of high-frequency transrectal ultrasound transducers allows for excellent visualization of equine lower urinary tract structures—this can lead to more accurate diagnoses and interventions for urinary tract disease in horses.